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**Answer:**

**d. C = 0.23(m – 100) + 34.99**

**Step-by-step explanation:**

Let C = X + Y, where

C = Cost of the bill in terms of m

X = First term of the equation

Y = Second term of the equation

X = add additional minutes to $ 0.23 minus the 100 minutes of use allocated.

**X = 0.23 (m – 100)
**

Y = Base price monthly will be $ 34.99

**Y = 34.99
**

C = X + Y

**C = 0.23 (m – 100) + 34.99
**

Note: The only possible answer is 0.23 (m – 100) + 34.99, but **we must assume that “m” is greater than or equal to 100**, that is, Bill consumes at least his 100 minutes assigned by the base price.

Hope this helps!

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